Carrageenan is a kind of natural polysaccharides hydrocolloid which is present in the structures of certain varieties of red seaweed. These carbohydrates have the ability to form, at very low concentrations, thick solutions or gels in aqueous media.
Carrageenan is usually in the form of white or tiny yellow powder, free of smell or taste. The gel is heat-reversible, it can dissolve after heating up and the solution can gel while cooling. It's steady-going, it may not reduce gel strength and viscosity even long-term placement. When used in combination with konjac, locust bean gum and xanthan, carrageenan can distinctly alter the gel characteristics and make gel elastic and water retentive.
Carrageenan is extensively applied in food field, medicine, chemical industry for daily supplies, biological chemistry, building paints, textile printing and agriculture.